Graco 15X303, Instructions And Parts Manual

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Installation
312782J 3
Installation
F
IG
. 2 shows the dispense valves installed in an elec-
tronic 2-component proportioning system. In this exam-
ple, the dispense valves are used as dose valves for
components A and B (DVA, DVB), an air purge valve
(APV), and a solvent purge valve (SPV).
F
IG
. 3 shows a pneumatic schematic of a complete
2-component proportioning system, in which the dis-
pense valves are also used as A and B dump valves,
and color change valves.
NOTE: See manual 332339 for instructions on how to
install the dispense valves in a ProMix PD2K Electronic
Positive Displacement Proportioning System.
Connect the Air Lines
Clean all lines and connections of dirt, burrs, etc., and
blow them out with clean air before connecting them to
the system. The air supply line should contain an air fil-
ter to remove harmful dirt and moisture from the com-
pressed air.
Use a normally closed 4-way air solenoid valve to con-
trol the dispense valve. Attach 5/32 in. (4 mm) OD air
supply lines from the 4-way valve to the air inlets of the
dispense valve.
Connect the Fluid Lines
Connect a grounded fluid line from the pump or meter to
the 1/4 npt fluid inlet of the dispense valve adapter.
If fluid is supplied by a pump, install a fluid pressure reg-
ulator upstream of the dispense valve. A fluid regulator
enables you to control fluid pressure more accurately
than by regulating air pressure to the pump.
Install a fluid filter to remove particles and sediment
which may clog the nozzle.
Accessories
Two accessories are required in your system: a
bleed-type master air valve and a fluid drain valve.
These accessories help reduce the risk of serious injury
including fluid injection, splashing in the eyes or on the
skin, and injury from moving parts if you are adjusting or
repairing the pump.
The bleed-type master air valve is required only with
air-powered pumps. It relieves air trapped between this
valve and the pump after the air regulator is shut off.
Trapped air can cause the pump to cycle unexpectedly.
Locate the valve close to the pump.
The fluid drain valve helps relieve fluid pressure in the
displacement pump, hose, and dispense valve; trigger-
ing the valve to relieve pressure may not be sufficient.
Grounding
To reduce the risk of static sparking, ground the pump
and all other components used or located in the dis-
pensing area. Check your local electrical code for
detailed instructions for your area and type of equipment
and be sure to ground all of these components.
• Fluid hoses: use only electrically conductive hoses
with a maximum of 500 feet (150 m) combined hose
length to ensure grounding continuity.
• Dispense valve: obtain grounding through connec-
tion to a properly grounded fluid hose and pump.